Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2022 Feb 26;32(5):e2336. doi: 10.1002/rmv.2336

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2022 John Wiley & Sons Ltd.

This article is being made freely available through PubMed Central as part of the COVID-19 public health emergency response. It can be used for unrestricted research re-use and analysis in any form or by any means with acknowledgement of the original source, for the duration of the public health emergency.

PMC Copyright notice

Network of eligible comparisons for respiratory viruses. (a) Influenza virus. (b) Coronavirus (including SARS, MERS and COVID‐19). (c) SARS (SARS‐CoV) and MERS (MERS‐CoV). (d) COVID‐19 (SARS‐CoV‐2). Control includes no mask wearing, or mask wearing at very low frequencies. Non‐medical masks include clothes or cotton masks. Lines indicate direct comparisons of agents, and the thickness of line corresponds to the number of trials in the comparison. The size of node corresponds to the number of studies that involve the intervention. COVID‐19, coronavirus disease‐19; MERS, Middle East respiratory syndrome; SARS, severe acute respiratory syndrome